X-Git-Url: https://git.saurik.com/apple/libpthread.git/blobdiff_plain/235d2f0e8fa84839307390481219c77389440e1b..c6e5f90c4dd303939f631da331df7b356da942e6:/tests/helpers/stackoverflow_crash.c?ds=inline

diff --git a/tests/helpers/stackoverflow_crash.c b/tests/helpers/stackoverflow_crash.c
new file mode 100644
index 0000000..2858033
--- /dev/null
+++ b/tests/helpers/stackoverflow_crash.c
@@ -0,0 +1,56 @@
+#include<stdio.h>
+#include<sys/resource.h>
+
+static volatile int * array1_ref = NULL;
+static long last_stack_addr = 0;
+
+static void
+recursive_fn(void)
+{
+	volatile int array1[1024]; /* leave this as it is */
+	int addr;
+	last_stack_addr = (long)&addr;
+	array1_ref = array1; /* make sure compiler cannot discard storage */
+	array1[0] = 0;
+	if (array1_ref == 0) {
+		/* fool clang -Winfinite-recursion */
+		return;
+	}
+	recursive_fn();
+	return;
+}
+
+int
+main(__unused int argc, __unused const char *argv[])
+{
+	struct rlimit save;
+
+	if (getrlimit(RLIMIT_STACK, &save) == -1) {
+		printf("child: ERROR - getrlimit");
+		return 2;
+	}
+	printf("child: LOG - current stack limits cur=0x%llx, max=0x%llx, inf=0x%llx\n", save.rlim_cur, save.rlim_max, RLIM_INFINITY);
+
+	if(save.rlim_cur >= save.rlim_max) {
+		printf("child: ERROR - invalid limits");
+		return 2;
+	}
+
+	if(save.rlim_max == RLIM_INFINITY) {
+		printf("child: ERROR - rlim_max = RLIM_INFINITY");
+		return 2;
+	}
+
+	save.rlim_cur += 4;
+
+	printf("child: LOG - Raising setrlimit rlim_cur=0x%llx, rlim_max=0x%llx\n", save.rlim_cur, save.rlim_max);
+
+	if (setrlimit(RLIMIT_STACK, &save) == -1) {
+		printf("child: ERROR - Raising the limits failed.");
+		return 2;
+	}
+
+	printf("child: LOG - Make the stack grow such that a SIGSEGV is generated.\n");
+	recursive_fn();
+	return 0;
+}